JP3207551U

JP3207551U - Sewing machine with needle attachment / detachment device

Info

Publication number: JP3207551U
Application number: JP2016004318U
Authority: JP
Inventors: 真中島
Original assignee: Janome Sewing Machine Co Ltd
Current assignee: Janome Corp
Priority date: 2016-09-05
Filing date: 2016-09-05
Publication date: 2016-11-17
Anticipated expiration: 2026-09-05

Abstract

【課題】針棒に対して針をワンタッチで着脱可能とした針着脱装置を備えたミシンを提供する。【解決手段】案内溝１２を有する針棒１と、垂直固定溝３２を有するジョイント部材Ａと、針保持部５と円筒部６と係止ピン７とを有する針止めＢとを備えること。ジョイント部材Ａの垂直固定溝３２は、水平案内溝１２ｂと直交する位置に配置される。針止めＢの係止ピン７は、ジョイント部材Ａを押し上げて垂直案内溝１２ａに挿入且つ周方向の回転にて水平案内溝１２ｂを移動し垂直固定溝位置３２に到達するとジョイント部材Ａは下降し、係止ピン７は垂直固定溝３２と水平案内溝１２ｂにて位置決め固定される。【選択図】図１A sewing machine including a needle attaching / detaching device that allows a needle to be attached to and detached from a needle bar with one touch. A needle bar (1) having a guide groove (12), a joint member (A) having a vertical fixing groove (32), and a needle stopper (B) having a needle holding part (5), a cylindrical part (6) and a locking pin (7). The vertical fixing groove 32 of the joint member A is disposed at a position orthogonal to the horizontal guide groove 12b. The locking pin 7 of the needle stop B pushes up the joint member A, is inserted into the vertical guide groove 12a and moves in the horizontal guide groove 12b by rotation in the circumferential direction, and when it reaches the vertical fixing groove position 32, the joint member A descends. The locking pin 7 is positioned and fixed by the vertical fixing groove 32 and the horizontal guide groove 12b. [Selection] Figure 1

Description

本考案は、家庭用ミシンにおいて、針棒に対して針をワンタッチで着脱可能とした針着脱装置を備えたミシンに関する。 The present invention relates to a sewing machine equipped with a needle attaching / detaching device that allows a needle to be attached to and detached from a needle bar in a household sewing machine.

従来、家庭用ミシンにおいて、針棒に対して針は着脱自在で、縫製される生地の種類或いは縫いパターン等によって、針を交換する必要がある。その針の交換手段の一般的なものとして、針棒に内螺子が形成され、該内螺子に螺合するビス，螺子部材等を介して針が着脱自在に装着されるものであった。 2. Description of the Related Art Conventionally, in a home sewing machine, a needle is detachable from a needle bar, and it is necessary to replace the needle depending on the type of fabric to be sewn or a sewing pattern. As a general means for exchanging the needle, an internal screw is formed on the needle bar, and the needle is detachably mounted via a screw, a screw member, or the like that is screwed into the internal screw.

特開昭６３−２２８７７号公報JP-A-63-22877 特開昭６３−３０９７７号公報Japanese Patent Laid-Open No. 63-30977

ところが、このように針棒に針を装着するためにビス又は螺子が使用される構造では、その着脱作業においてドライバ等の工具が必要となる。また、部品も多くなり、特にビスや螺子等は細かい部品なので、紛失するおそれもある。また、針棒への針の装着作業も面倒である。 However, in such a structure in which a screw or a screw is used to attach a needle to the needle bar, a tool such as a screwdriver is required for the attaching / detaching operation. In addition, the number of parts increases, and in particular, screws and screws are fine parts and may be lost. Also, the operation of attaching the needle to the needle bar is troublesome.

このようなことから、針棒に対して針を簡易且つ迅速に装着することができるものが開発されている。この種のものとして、特許文献１及び特許文献２が存在する。まず、特許文献１では、ミシン針(10)が針シャンクアダプター(30)に保持された状態で、針棒(20)の保持孔(22)に溝状切欠部をおおむね係合ピン(23)側に合わせて針シャンクアダプター(30)の上端部を挿入し、溝状切欠部と係合ピン(23)とにより針シャンクアダプター(30)を針棒(20)に結合させる構造である。 For this reason, those that can easily and quickly attach the needle to the needle bar have been developed. Patent Document 1 and Patent Document 2 exist as this type. First, in Patent Document 1, in a state where the sewing needle (10) is held by the needle shank adapter (30), a groove-shaped notch is generally formed in the holding hole (22) of the needle bar (20). The upper end of the needle shank adapter (30) is inserted in accordance with the side, and the needle shank adapter (30) is coupled to the needle bar (20) by the groove-shaped notch and the engaging pin (23).

ピン付勢部材(25)は、リング上で係合ピン(23)と当接するテーパ面を持つとともに針棒糸掛け孔を保持する。ミシン針と針シャンクアダプターは、一体化されている。針シャンクアダプターは、針棒に挿人されたときに挿入停止位置を決定するストツパー部を持つ。特許文献１では、ミシン針(10)が針シャンクアダプター(30)に保持された状態で、針棒(20)の保持孔(22)に案内突起(341)を案内溝で案内しつつ針シャンクアダプターの上端部を挿入し、ネック部と係合ピンとにより針シャンクアダプター(30)を針棒に結合させる構造である。 The pin urging member (25) has a tapered surface that comes into contact with the engagement pin (23) on the ring and holds the needle bar threading hole. The sewing needle and the needle shank adapter are integrated. The needle shank adapter has a stopper part that determines the insertion stop position when inserted into the needle bar. In Patent Document 1, in a state where the sewing needle (10) is held by the needle shank adapter (30), the needle shank is guided through the guide groove (341) by the guide groove into the holding hole (22) of the needle bar (20). The upper end portion of the adapter is inserted, and the needle shank adapter (30) is coupled to the needle bar by the neck portion and the engagement pin.

針シャンクアダプター(30)は、ネック部(331)から保持孔(22)入口端部に向かって外径が次第に大きくなるテーパ外周面をもつ。ミシン針(10)と針シャンクアダプター(30)は一体的に固定されている。針シャンクアダプター(30)はくびれネック部(331)と、ネック部(331)と接合する個の係合ピン(27)と、係合ピン(27)を中心方向に付勢し切欠部を持つリング状の板バネ(28)とから構成される。 The needle shank adapter (30) has a tapered outer peripheral surface whose outer diameter gradually increases from the neck portion (331) to the inlet end portion of the holding hole (22). The sewing needle (10) and the needle shank adapter (30) are fixed integrally. The needle shank adapter (30) has a constricted neck portion (331), individual engagement pins (27) joined to the neck portion (331), and a biased portion of the engagement pin (27) in the center direction. It is composed of a ring-shaped leaf spring (28).

特許文献１では、係合ピン(23)のみで回転方向を付勢しており、回転方向に対して容易に回転してしまう構造上の問題がある。針シャンクアダプター（30）を保持する係合ピン（23）を付勢させる、リング状の付勢部材（25）に針棒糸掛け孔を持っていることで、針孔との位置関係が容易にずれてしまう構造上の問題がある。 In Patent Document 1, there is a structural problem that the rotation direction is biased only by the engagement pin (23), and the rotation is easily performed with respect to the rotation direction. The ring-shaped urging member (25) that urges the engagement pin (23) that holds the needle shank adapter (30) has a needle bar thread hooking hole, so the positional relationship with the needle hole is easy. There is a structural problem that shifts.

リング状の付勢部材(25)と係合ピン(23)が当接するテーパ面で係合ピン(23)が保持孔(22)に移動してしまい、針シャンクアダプター(30)が取り付けられない状況となる可能性がある。また、針シャンクアダプター(30)が針棒に確実に固定されたかを確認することができない構造上の問題が存在する。 The engagement pin (23) moves to the holding hole (22) at the tapered surface where the ring-shaped biasing member (25) and the engagement pin (23) abut, and the needle shank adapter (30) cannot be attached. It can be a situation. There is also a structural problem in which it cannot be confirmed whether the needle shank adapter (30) is securely fixed to the needle bar.

特許文献２では、係合ピン(27)をリング状の板バネ（28）で中心方向に付勢し、ネック部（331）に係合ピン（27）を押し付ける構造となっており、板バネ(28）の力のみで針シャンクアダプター(30)を固定している為、針が布に刺さった状態で糸絡まりを起こすと、針シャンクアダプター(30)が外れてしまう可能性がある。また、針シャンクアダプター(30)が外れた状態で、ミシンが動いてしまう可能性がある。ロック機構が働く場合はミシンが停止するが針シャンクアダプター（30）が外れた場合はロック機構が働かない可能性があり、安全性に問題がある。 In Patent Document 2, the engagement pin (27) is urged in the center direction by a ring-shaped leaf spring (28), and the engagement pin (27) is pressed against the neck portion (331). Since the needle shank adapter (30) is fixed only by the force of (28), if the thread is entangled with the needle stuck in the cloth, the needle shank adapter (30) may come off. Further, there is a possibility that the sewing machine moves with the needle shank adapter (30) detached. When the lock mechanism works, the sewing machine stops, but when the needle shank adapter (30) comes off, the lock mechanism may not work, which is a safety problem.

そこで、本考案の目的（解決しようとする技術的課題）は、針棒に対して針を略ワンタッチで着脱可能とし、且つミシンの稼動時の振動に対しても十分に耐え得るミシンの針着脱装置を提供することにある。 Therefore, the purpose of the present invention (technical problem to be solved) is to allow the needle to be attached to and detached from the needle bar with almost one touch, and to attach and detach the sewing machine with sufficient resistance to vibration during operation of the sewing machine. To provide an apparatus.

そこで、考案者は、上記課題を解決すべく、鋭意，研究を重ねた結果、請求項１の考案を、針を装着して上下動する中空状の針棒の下方外周に形成された下端に向けて開口する垂直案内溝と該垂直案内溝に連続する水平案内溝とからなる案内溝と、下端に向けて開口する垂直固定溝を有し且つ前記針棒の下端近傍に周方向に回転が規制され且つ上下方向に移動可能に装着されるジョイント部材と、針保持部と該針保持部の上部に形成されて前記針棒下端に嵌装する円筒部と該円筒部の軸心と直交する方向で外周に突出する係止ピンとを有する針止めとを備え、前記ジョイント部材の前記垂直固定溝は、前記水平案内溝と直交する位置に配置され、前記針止めの前記係止ピンは前記ジョイント部材を押し上げて前記垂直案内溝に挿入し、周方向の回転にて前記水平案内溝を移動して前記垂直固定溝位置に到達すると前記ジョイント部材は下降し、前記係止ピンは前記垂直固定溝と前記水平案内溝にて位置決め固定されてなる針着脱装置を備えたミシンとしたことにより、上記課題を解決した。 Therefore, as a result of intensive studies and researches, the inventor has applied the idea of claim 1 to the lower end formed on the lower outer periphery of a hollow needle bar that moves up and down with a needle attached. A vertical guide groove that opens toward the lower end of the needle bar, and a vertical fixing groove that opens toward the lower end. A joint member that is regulated and is mounted so as to be movable in the vertical direction, a needle holding portion, a cylindrical portion that is formed on the upper portion of the needle holding portion and is fitted to the lower end of the needle bar, and is orthogonal to the axis of the cylindrical portion A locking pin that protrudes outward in the direction, and the vertical fixing groove of the joint member is disposed at a position orthogonal to the horizontal guide groove, and the locking pin of the needle lock is the joint Push the member up and insert it into the vertical guide groove, circumferential direction When the horizontal guide groove is moved by rotation and reaches the position of the vertical fixing groove, the joint member descends, and the locking pin is positioned and fixed by the vertical fixing groove and the horizontal guide groove. By solving the problem, the above-mentioned problems were solved.

請求項２の考案を、針を装着して上下動する中空状の針棒の下方外周に形成された下端に向けて開口する垂直案内溝と該垂直案内溝に連続する水平案内溝とからなる案内溝と、前記針棒の中空部に収納されるバネと、前記針棒が摺動する摺動孔を有し且つ周壁に下端に向けて開口する垂直固定溝が形成された筒状部と該筒状部の上下方向の摺動と回動を規制するための固定ピンとからなるジョイント部材と、針を保持する針保持部と該針保持部の上部に形成されて前記針棒下端に嵌装する円筒部と該円筒部の軸心と直交する方向で外周に突出する係止ピンとを有する針止めとを備え、前記針棒の下端が前記ジョイント部材の前記摺動孔に挿入され且つ前記固定ピンは前記針棒下端付近に設けられた上下方向に延在する長孔に貫通し、前記ジョイント部材は前記長孔の範囲において上下動可能とする共に、前記固定ピンを介して前記バネにより下方に弾性付勢され、前記針止めの係止ピンは前記水平案内孔溝と垂直固定溝とによって位置決めされる構成としてなる針着脱装置を備えたミシンとしたことにより、上記課題を解決した。 The invention of claim 2 comprises a vertical guide groove that opens toward the lower end formed on the lower outer periphery of a hollow needle bar that moves up and down with a needle mounted thereon, and a horizontal guide groove that continues to the vertical guide groove. A guide groove, a spring housed in the hollow portion of the needle bar, and a cylindrical part having a sliding hole in which the needle bar slides and having a vertical fixing groove opened toward the lower end on the peripheral wall; A joint member comprising a fixing pin for restricting sliding and rotation of the cylindrical portion in the vertical direction, a needle holding portion for holding a needle, and an upper portion of the needle holding portion and fitted to the lower end of the needle bar. A needle stopper having a cylindrical portion to be mounted and a locking pin protruding outward in a direction orthogonal to the axis of the cylindrical portion, and a lower end of the needle bar is inserted into the sliding hole of the joint member and The fixing pin penetrates a long hole provided in the vicinity of the lower end of the needle bar and extending in the vertical direction. The thread member is vertically movable in the range of the long hole, and is elastically biased downward by the spring via the fixing pin, and the locking pin for the needle stopper includes the horizontal guide hole groove and the vertical fixing groove. The above-described problems have been solved by using a sewing machine including a needle attaching / detaching device that is positioned by the above.

請求項３の考案を、前記針止めの前記円筒部の頂部には直径方向に沿って軸挿入溝が形成され、適正な装着状態で、前記ジョイント部材の前記固定ピンが前記軸挿入溝に挿入する構成としてなる請求項２に記載の針着脱装置を備えたミシンとしたことにより、上記課題を解決した。請求項４の考案を、前記ジョイント部材には摘みを備えた請求項１，２又は３の何れか１項に記載の針着脱装置を備えたミシンとしたことにより、上記課題を解決した。 According to a third aspect of the present invention, a shaft insertion groove is formed along the diametrical direction at the top of the cylindrical portion of the needle clamp, and the fixing pin of the joint member is inserted into the shaft insertion groove in an appropriate mounting state. The above-described problem has been solved by using a sewing machine provided with the needle attaching / detaching device according to claim 2 configured as described above. According to a fourth aspect of the present invention, the above problem is solved by using a sewing machine including the needle attachment / detachment device according to any one of the first, second, or third aspect, wherein the joint member includes a knob.

請求項１及び請求項２の考案では、針棒の下端付近に装着されたジョイント部材に対して、針止めを上方に向かって押し付けるようにすることで、係止ピンがジョイント部材を押し上げつつ、針棒の下端に形成された垂直案内溝に前記係止ピンが挿入し、該垂直案内溝の上端箇所で前記針止めを周方向に回転させることで、係止ピンはジョイント部材の垂直固定溝の位置に到達する。 In the invention of claim 1 and claim 2, by pressing the needle stopper upward against the joint member mounted near the lower end of the needle bar, the locking pin pushes up the joint member, The locking pin is inserted into a vertical guide groove formed at the lower end of the needle bar, and the needle pin is rotated in the circumferential direction at the upper end portion of the vertical guide groove, so that the locking pin becomes a vertical fixing groove of the joint member. To reach the position.

そこで、バネにて下方に弾性付勢されているジョイント部材は下降して、前記係止ピンが針棒の水平案内溝と、ジョイント部材の垂直固定溝とで略十字状となるように包囲され、これによって針止めが針棒にジョイント部材を介して固定される。このように、本考案では、針止めを針棒の下端よりジョイント部材を上昇させるように押し上げ、次いで周方向に回転させるのみで、針止めを針棒に極めて簡単に装着することができる。 Therefore, the joint member elastically biased downward by the spring is lowered, and the locking pin is surrounded by a horizontal guide groove of the needle bar and a vertical fixing groove of the joint member so as to form a substantially cross shape. Thus, the needle stopper is fixed to the needle bar via the joint member. As described above, in the present invention, the needle stopper can be attached to the needle bar very simply by pushing the needle stopper upward from the lower end of the needle bar and then rotating it in the circumferential direction.

また、針止めは、針棒に対してその装着状態が、水平状の水平案内溝と、垂直状の垂直固定溝とが交差してその中心に係止ピンが存在し、且つジョイント部材はバネにて下方に弾性付勢されるので、簡単な構成で且つ簡単な作業でありながら係止ピンは針棒及びジョイント部材の両方に極めて強固に固定されるものである。特に、請求項２では、針棒に対するジョイント部材の下方への弾性付勢をバネにて行うものであり、該バネは針棒内に収納されるため、針棒及びその周辺の構成を簡潔なものとすることができる。 The needle clamp is attached to the needle bar when the horizontal horizontal guide groove intersects with the vertical vertical fixing groove, and there is a locking pin at the center, and the joint member is a spring. Therefore, the locking pin is fixed to both the needle bar and the joint member very firmly with a simple structure and a simple operation. In particular, according to the second aspect of the present invention, the spring is used to elastically bias the joint member downward with respect to the needle bar. Since the spring is housed in the needle bar, the configuration of the needle bar and its surroundings can be simplified. Can be.

請求項３の考案では、前記針止めの前記円筒部の頂部には直径方向に沿って軸挿入溝が形成され、適正な装着状態で、前記ジョイント部材の前記固定ピンが前記軸挿入溝に挿入する構成としたことにより、針止めは、係止ピンに加えて固定ピンによっても周方向における回転を防止し、より一層強固なが針止めの針棒への装着にすることができる。請求項４の考案では、前記ジョイント部材には摘みを備えたことにより、針棒に装着した針止めを取り外す場合には、ジョイント部材を一旦上方に押し上げるものであるが、このとき摘みを指でつまんで持ち上げることができ、作業の効率及び安全性を有することができる。 According to a third aspect of the present invention, a shaft insertion groove is formed along the diametrical direction at the top of the cylindrical portion of the needle stopper, and the fixing pin of the joint member is inserted into the shaft insertion groove in an appropriate mounting state. By adopting such a configuration, the needle stopper can be prevented from rotating in the circumferential direction not only by the locking pin but also by the fixing pin, so that the needle stopper can be more firmly attached to the needle bar. In the invention of claim 4, the joint member is provided with a knob so that when removing the needle stopper attached to the needle bar, the joint member is once pushed upward. It can be picked up and lifted, and can have work efficiency and safety.

（Ａ）は本考案において針棒にジョイント部材を介して針止めが装着された状態の側面図、（Ｂ）は（Ａ）の（α）部拡大図、（Ｃ）は（Ｂ）の針棒と針止めとを分離した状態図、（Ｄ）は針棒からジョイント部材を外した状態の要部拡大断面図、（Ｅ）は別の構造とした針棒からジョイント部材を外した状態の要部拡大断面図である。(A) is a side view of the present invention in a state where a needle stopper is attached to a needle bar via a joint member, (B) is an enlarged view of part (α) of (A), and (C) is a needle of (B). A state diagram in which the bar and the needle stopper are separated, (D) is an enlarged cross-sectional view of the main part with the joint member removed from the needle bar, and (E) is a state with the joint member removed from the needle bar having another structure. It is a principal part expanded sectional view. （Ａ）は本考案において針棒にジョイント部材を介して針止めが装着された状態の要部拡大斜視図、（Ｂ）針棒とジョイント部材と針止めとを分離した状態の要部拡大斜視図、（Ｃ）は針棒の下端部分を示す拡大斜視図、（Ｄ）はジョイント部材の下方より見た拡大斜視図。(A) The principal part expansion perspective view of the state in which the needle stopper is attached to the needle bar via the joint member in the present invention, (B) The principal part enlarged perspective view of the state where the needle bar, the joint member and the needle stopper are separated. FIG. 4C is an enlarged perspective view showing a lower end portion of the needle bar, and FIG. 4D is an enlarged perspective view seen from below the joint member. （Ａ）は本考案において針棒にジョイント部材を介して針止めが装着された状態の一部断面にした拡大図、（Ｂ）は針棒に針止めを取り付けようとする状態の一部断面にした拡大図、（Ｃ）は（Ａ）のＹ1−Ｙ1矢視断面図である。(A) is an enlarged view of a partial cross-section of the present invention with the needle bar attached to the needle bar via a joint member, and (B) is a partial cross-section of the needle bar with the needle bar attached. (C) is a Y1-Y1 arrow sectional view of (A). （Ａ）は本考案において針棒とジョイント部材との構成を示す拡大断面図、（Ｂ）は（Ａ）のＸ1−Ｘ1矢視断面図、（Ｃ）は（Ａ）のＸ2−Ｘ2矢視断面図。(A) is an enlarged sectional view showing the configuration of the needle bar and the joint member in the present invention, (B) is a sectional view taken along arrow X1-X1 in (A), and (C) is taken along arrow X2-X2 in (A). Sectional drawing. （Ａ）乃至（Ｅ）は針棒に針止めを装着する行程図である。(A) thru | or (E) are stroke diagrams which attach a needle stopper to a needle bar.

以下、本考案の実施形態を図面に基づいて説明する。本考案は、図１に示すように、主に針棒１と、バネ２と、ジョイント部材Ａ及び針止めＢによって構成されている。針棒１は、ミシンに垂直状に装着され、その下方側に中空部１１が設けられている〔図１(Ｄ），図３等参照〕。該中空部１１の下端は開口１１ａとして形成されている。 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the present invention mainly includes a needle bar 1, a spring 2, a joint member A, and a needle stopper B. The needle bar 1 is vertically mounted on the sewing machine, and a hollow portion 11 is provided on the lower side thereof (see FIGS. 1D and 3). The lower end of the hollow portion 11 is formed as an opening 11a.

中空部１１は、針棒１の軸方向全体に亘って形成されるものではなく、下方部分に形成される〔図１（Ｄ）及び図３参照）。また、針棒１の軸方向全体に亘って管状とし、特に下方部分のみを大径の中空部１１としてもよい。中空部１１には、後述するバネ２が収納される〔図１（Ｄ）及び図３等参照）。 The hollow portion 11 is not formed over the entire axial direction of the needle bar 1, but is formed in a lower portion (see FIGS. 1D and 3). Moreover, it is good also as a tubular shape over the whole axial direction of the needle bar 1, and it is good also as the large-diameter hollow part 11 especially only a lower part. A spring 2 described later is accommodated in the hollow portion 11 (see FIGS. 1D and 3).

または、中空軸の針棒１でもよい。中空軸とした針棒１の下端近傍において保持ピン８を軸心に直交するように設けることで、針棒１に内装したバネ２の上端位置を決めることが可能である〔図１（Ｅ）参照〕。さらに、バネ２の上端部分を前記保持ピン８に係止し、針棒１から落下しないようにすることもできる。 Alternatively, a hollow shaft needle bar 1 may be used. By providing the holding pin 8 in the vicinity of the lower end of the needle bar 1 as a hollow shaft so as to be orthogonal to the axis, it is possible to determine the upper end position of the spring 2 housed in the needle bar 1 [FIG. reference〕. Furthermore, the upper end portion of the spring 2 can be locked to the holding pin 8 so as not to fall from the needle bar 1.

針棒１の下端には、案内溝１２が対向する位置に形成されている〔図２（Ｃ），図４（Ａ），（Ｃ）参照〕。案内溝１２は、垂直案内溝１２ａと、水平案内溝１２ｂとから構成され、垂直案内溝１２ａは、下端が針棒１の下端と一致し開放されている。水平案内溝１２ｂは、水平状の溝で、前記垂直案内溝１２ａの上端と連通している。二つの案内溝１２，１２は、両垂直案内溝１２ａの上端より連続して、周方向に沿って同一方向にそれぞれの水平案内溝１２ｂ，１２ｂが延在形成されている〔図２(Ｃ)，図４（Ｃ）参照〕。 At the lower end of the needle bar 1, a guide groove 12 is formed at a position facing the needle bar 1 (see FIGS. 2C, 4A, and 4C). The guide groove 12 is composed of a vertical guide groove 12a and a horizontal guide groove 12b, and the vertical guide groove 12a is opened with its lower end coinciding with the lower end of the needle bar 1. The horizontal guide groove 12b is a horizontal groove and communicates with the upper end of the vertical guide groove 12a. The two guide grooves 12 and 12 are continuously formed from the upper ends of both vertical guide grooves 12a, and the respective horizontal guide grooves 12b and 12b extend in the same direction along the circumferential direction [FIG. FIG. 4 (C)].

針棒１の下方には対向して長孔１３，１３が形成されている。長孔１３は、針棒１の軸方向に延在する孔であり、前記中空部１１の形成範囲内に形成される。両長孔１３，１３には、後述する固定ピン４をジョイント部材Ａの筒状部３を介して挿入し、長孔１３，１３に沿って上下動する〔図２（Ｂ），図３，図４（Ａ），（Ｂ）参照〕。 Long holes 13 are formed below the needle bar 1 so as to face each other. The long hole 13 is a hole extending in the axial direction of the needle bar 1 and is formed within the formation range of the hollow portion 11. A fixing pin 4 to be described later is inserted into both the long holes 13 and 13 through the cylindrical portion 3 of the joint member A, and moves up and down along the long holes 13 and 13 [FIG. 2 (B), FIG. See FIGS. 4A and 4B].

前記中空部１１には、バネ２が収納される。バネ２は、具体的にはコイルバネが使用される〔図１，図２（Ａ），（Ｂ），図３等参照〕。バネ２は、中空部１１の形成されている範囲内で弾性的に伸縮するものであり、バネ２の上端は中空部１１の段差形状とした上端で固定される。或いはバネ２の上端は、前述した前記保持ピン８にて固定しても良い。バネ２は、前記固定ピン４を常時下方に向かって弾性付勢する。 A spring 2 is accommodated in the hollow portion 11. Specifically, a coil spring is used as the spring 2 [see FIGS. 1, 2A, 2B, 3 etc.]. The spring 2 elastically expands and contracts within the range where the hollow portion 11 is formed, and the upper end of the spring 2 is fixed at the upper end of the hollow portion 11 having a stepped shape. Alternatively, the upper end of the spring 2 may be fixed by the holding pin 8 described above. The spring 2 always elastically biases the fixing pin 4 downward.

ジョイント部材Ａは、主に筒状部３と、固定ピン４とから構成される。筒状部３は、円筒環形状をなし、その中心に摺動孔３１が形成されている〔図２（Ｂ），（Ｄ）参照〕。該摺動孔３１は、前記針棒１が挿入することができ、且つ筒状部３が針棒１に対して円滑に摺動することができる。 The joint member A is mainly composed of a cylindrical portion 3 and a fixing pin 4. The cylindrical portion 3 has a cylindrical ring shape, and a sliding hole 31 is formed at the center thereof (see FIGS. 2B and 2D). The needle hole 1 can be inserted into the sliding hole 31, and the cylindrical portion 3 can slide smoothly with respect to the needle bar 1.

筒状部３には、対向して垂直固定溝３２，３２が形成されている〔図２(Ｄ)参照〕。両該垂直固定溝３２，３２は、筒状部３の下端に向けて開放されている。さらに、筒状部３には固定ピン４が貫通するピン貫通孔３３,３３が形成されている〔図２(Ｂ)，（Ｄ），図４（Ｂ）参照〕。 The cylindrical portion 3 is formed with vertical fixing grooves 32 and 32 facing each other (see FIG. 2D). Both the vertical fixing grooves 32, 32 are open toward the lower end of the cylindrical portion 3. Further, pin through holes 33 and 33 through which the fixing pin 4 passes are formed in the cylindrical portion 3 (see FIGS. 2B, 2D, and 4B).

また、筒状部３には摘み部３４が形成されている。摘み部３４は、前記筒状部３の外周より、外方に向かって板片状に形成された部位である。摘み部３４は、作業員の指先でつまむことができる程度の大きさである。また、摘み部３４の形状として、特に図示しないが筒状部３の下端より円板状に外方に突出する鍔状としたものも存在する。 Further, a knob portion 34 is formed in the cylindrical portion 3. The knob portion 34 is a portion formed in a plate shape outward from the outer periphery of the cylindrical portion 3. The knob 34 is large enough to be pinched with the fingertips of the workers. Further, as a shape of the knob portion 34, there is a hook shape that protrudes outwardly in a disc shape from the lower end of the cylindrical portion 3, although not particularly illustrated.

ジョイント部材Ａは、筒状部３の摺動孔３１に針棒１を挿入し、固定ピン４を針棒１の長孔１３，１３及び筒状部３のピン貫通孔３３,３３に挿通する〔図４（Ａ），(Ｂ)参照〕。ここで固定ピン４は前記ピン貫通孔３３,３３に対しては圧入等の固定手段にて固定され、長孔１３，１３に対しては、円滑に上下方向に往復移動可能に遊挿状態とされる。 The joint member A inserts the needle bar 1 into the sliding hole 31 of the cylindrical part 3, and inserts the fixing pin 4 into the long holes 13 and 13 of the needle bar 1 and the pin through holes 33 and 33 of the cylindrical part 3. [See FIGS. 4A and 4B]. Here, the fixing pin 4 is fixed to the pin through holes 33, 33 by fixing means such as press fitting, and the long holes 13, 13 are in a loosely inserted state so as to be smoothly reciprocated in the vertical direction. Is done.

固定ピン４は、針棒１の中空部１１に収納されたバネ２の弾性力によって常時下方に弾性付勢される。固定ピン４は、針棒１の両長孔１３，１３の下端で停止した状態であり、固定ピン４と共にジョイント部材Ａは針棒１の下端箇所に停止した状態となる。このとき、針棒１の下端位置と、筒状部３の下端位置とは一致或いは略一致することが好ましい。 The fixing pin 4 is always elastically biased downward by the elastic force of the spring 2 housed in the hollow portion 11 of the needle bar 1. The fixing pin 4 is in a state of being stopped at the lower ends of both the long holes 13 and 13 of the needle bar 1, and the joint member A together with the fixing pin 4 is in a state of being stopped at the lower end portion of the needle bar 1. At this time, it is preferable that the lower end position of the needle bar 1 and the lower end position of the cylindrical portion 3 coincide or substantially coincide.

ジョイント部材Ａは、固定ピン４と、針棒１の長孔１３，１３によって周方向に回動が規制される〔図４(Ｂ)参照〕。そして、固定ピン４が長孔１３，１３を上下動する範囲において、ジョイント部材Ａは上下動することができる。そして、垂直固定溝３２，３２は、水平案内溝１２ｂ，１２ｂと直交する位置に配置する。好ましくは、垂直固定溝３２，３２は、水平案内溝１２ｂ，１２ｂの終端位置と重なるものであることが好ましい。 The rotation of the joint member A in the circumferential direction is restricted by the fixing pin 4 and the long holes 13 and 13 of the needle bar 1 (see FIG. 4B). The joint member A can move up and down in the range in which the fixing pin 4 moves up and down the long holes 13 and 13. The vertical fixing grooves 32 and 32 are arranged at positions orthogonal to the horizontal guide grooves 12b and 12b. Preferably, the vertical fixing grooves 32 and 32 overlap with the end positions of the horizontal guide grooves 12b and 12b.

次に、針止めＢは、主に針保持部５と、円筒部６と、係止ピン７とから構成されている（図２，図３参照）。針保持部５は、保持筐体５１と締付部５２とから構成される。保持筐体５１は、略直方体状に形成され、針９を保持する役目をなす部位である。締付部５２は、保持筐体５１に保持された針９を固定する役目をなすものである。締付部５２は、ビス等を備え、保持筐体５１内に挿入された針９の頭部を押え付けて固定するものである。 Next, the needle stopper B mainly includes a needle holding portion 5, a cylindrical portion 6, and a locking pin 7 (see FIGS. 2 and 3). The needle holding unit 5 includes a holding housing 51 and a tightening unit 52. The holding housing 51 is a portion that is formed in a substantially rectangular parallelepiped shape and serves to hold the needle 9. The tightening portion 52 serves to fix the needle 9 held by the holding housing 51. The tightening portion 52 includes a screw or the like, and presses and fixes the head of the needle 9 inserted into the holding housing 51.

針保持部５の保持筐体５１の上部には、円筒部６が形成されている。該円筒部６は、前記針棒１の開口１１ａから中空部１１内へ挿入する部位である。したがって、円筒部６が中空部１１に挿入された状態で針止めＢにガタツキが生じない程度に、円筒部６の外径と中空部１１の内径が設定される。 A cylindrical portion 6 is formed on the upper portion of the holding housing 51 of the needle holding portion 5. The cylindrical portion 6 is a portion that is inserted into the hollow portion 11 from the opening 11 a of the needle bar 1. Therefore, the outer diameter of the cylindrical portion 6 and the inner diameter of the hollow portion 11 are set to such an extent that the needle stopper B does not rattle when the cylindrical portion 6 is inserted into the hollow portion 11.

また、円筒部６には、その外周面から対向して突出する係止ピン７が設けられている。係止ピン７は、円筒部６の直径方向に貫通し、前記係止ピン７の両端部分が円筒部６の外周面より突出する構成であっても良い〔図２（Ｂ）参照〕。さらに円筒部６の頂部６ａには、直径方向に沿って軸挿入溝６１が形成されている〔図２（Ｂ），図３（Ｃ）参照〕。 In addition, the cylindrical portion 6 is provided with a locking pin 7 that protrudes from the outer peripheral surface thereof. The locking pin 7 may be configured to penetrate in the diameter direction of the cylindrical portion 6 and have both end portions of the locking pin 7 project from the outer peripheral surface of the cylindrical portion 6 (see FIG. 2B). Further, a shaft insertion groove 61 is formed in the top portion 6a of the cylindrical portion 6 along the diametrical direction (see FIGS. 2B and 3C).

該軸挿入溝６１には、前記固定ピン４が水平方向で挿入できる溝となっている〔図２（Ｂ），図３（Ｃ）参照〕。軸挿入溝６１と円筒部６に貫通する係止ピン７は直角に交わる状態となっている。係止ピン７は、その両端が、針棒１のジョイント部材Ａの両垂直固定溝３２，３２に架かる程度の長さを有している。 The shaft insertion groove 61 is a groove into which the fixing pin 4 can be inserted in the horizontal direction (see FIGS. 2B and 3C). The shaft insertion groove 61 and the locking pin 7 penetrating the cylindrical portion 6 are in a state of intersecting at right angles. The locking pin 7 has such a length that both ends thereof extend over both vertical fixing grooves 32, 32 of the joint member A of the needle bar 1.

次に、本考案において、針止めＢを針棒１に対して着脱する行程について説明する（図５参照）。まず、針止めＢを針棒１に装着する行程を説明する。ジョイント部材Ａの摘み部３４を指先で持ち上げ、ジョイント部材Ａを針止めＢに対して上昇させる。ジョイント部材Ａが上昇すると、針棒１の下端付近の案内溝１２，１２が外部に露出する〔図５（Ａ），（Ｂ）参照〕。 Next, the process of attaching / detaching the needle stopper B to / from the needle bar 1 in the present invention will be described (see FIG. 5). First, the process of attaching the needle stopper B to the needle bar 1 will be described. The knob 34 of the joint member A is lifted with a fingertip, and the joint member A is raised with respect to the needle stop B. When the joint member A is raised, the guide grooves 12 and 12 near the lower end of the needle bar 1 are exposed to the outside (see FIGS. 5A and 5B).

そして、このとき案内溝１２の垂直案内溝１２ａを目視しながら、針止めＢの係止ピン７を垂直案内溝１２ａの下端開放箇所から挿入しつつ、同時に円筒部６を針棒１の中空部１１に挿入する〔図５（Ｂ），（Ｃ）参照〕。そして針止めＢを針棒１に沿って上昇させると、係止ピン７が垂直案内溝１２ａ，１２ａの上端に到達する。垂直案内溝１２ａ，１２ａは、その上端が水平案内溝１２ｂ，１２ｂに連通しているので、針止めＢを水平案内溝１２ｂ，１２ｂの延在する方向に回転させることができる〔図５（Ｄ）参照〕。 At this time, while visually observing the vertical guide groove 12a of the guide groove 12, the cylindrical pin 6 is inserted into the hollow portion of the needle bar 1 while the locking pin 7 of the needle stopper B is inserted from the lower end open position of the vertical guide groove 12a. 11 (see FIGS. 5B and 5C). When the needle stopper B is raised along the needle bar 1, the locking pin 7 reaches the upper ends of the vertical guide grooves 12a and 12a. Since the upper ends of the vertical guide grooves 12a and 12a communicate with the horizontal guide grooves 12b and 12b, the needle stopper B can be rotated in the extending direction of the horizontal guide grooves 12b and 12b [FIG. )reference〕.

針止めＢを水平案内溝１２ｂ，１２ｂに沿って回転させることで、係止ピン７の両端が水平案内溝１２ｂ，１２ｂのそれぞれの終端に到達する。このとき、係止ピン７の両端は、ジョイント部材Ａの垂直固定溝３２，３２の位置に到達している。この時、固定ピン４が円筒部６の軸挿入溝６１に挿入される位置にあるので、そのままジョイント部材Ａを下降させることができ、固定ピン４が円筒部６の軸挿入溝６１に挿入されると針止めＢの周方向の回動を不可能にすると共に、係止ピン７の両端に両垂直固定溝３２，３２が被さるようにして係止される。このとき、係止ピン７の端部は、垂直固定溝３２と水平案内溝１２ｂとで係止された状態となる〔図５（Ｅ）参照〕。 By rotating the needle stopper B along the horizontal guide grooves 12b and 12b, both ends of the locking pin 7 reach the respective ends of the horizontal guide grooves 12b and 12b. At this time, both ends of the locking pin 7 reach the positions of the vertical fixing grooves 32 and 32 of the joint member A. At this time, since the fixing pin 4 is in a position to be inserted into the shaft insertion groove 61 of the cylindrical portion 6, the joint member A can be lowered as it is, and the fixing pin 4 is inserted into the shaft insertion groove 61 of the cylindrical portion 6. Then, the rotation of the needle stopper B in the circumferential direction is made impossible, and the both ends of the locking pin 7 are locked so as to cover both the vertical fixing grooves 32, 32. At this time, the end portion of the locking pin 7 is locked by the vertical fixing groove 32 and the horizontal guide groove 12b [see FIG. 5 (E)].

また、針止めＢは、係止ピン７の両端を針棒１の垂直案内溝１２ａ，１２ａに挿入させ、そのまま上昇させることにより、円筒部６が固定ピン４を押し上げることになりジョイント部材Ａも上昇させることができる。そして、係止ピン７が水平案内溝１２ｂ，１２ｂの位置に到達したら、針止めＢを所定方向に回転させることで、係止ピン７の両端がジョイント部材Ａの垂直固定溝３２，３２の位置に到達する。 Further, the needle stopper B is inserted into the vertical guide grooves 12a and 12a of the needle bar 1 at both ends of the locking pin 7 and lifted as it is, so that the cylindrical portion 6 pushes up the fixing pin 4 and the joint member A is also used. Can be raised. When the locking pin 7 reaches the position of the horizontal guide grooves 12b, 12b, the needle stopper B is rotated in a predetermined direction so that both ends of the locking pin 7 are positioned at the vertical fixing grooves 32, 32 of the joint member A. To reach.

この時、固定ピン４が円筒部６の軸挿入溝６１に挿入される位置にあるので、そのままジョイント部材Ａを下降させることができ、固定ピン４が円筒部６の軸挿入溝６１に挿入されると針止めＢの回転方向の位置が決まり、該垂直固定溝３２，３２はそのまま下方に下降して、係止ピン７の両端に係止することができる。 At this time, since the fixing pin 4 is in a position to be inserted into the shaft insertion groove 61 of the cylindrical portion 6, the joint member A can be lowered as it is, and the fixing pin 4 is inserted into the shaft insertion groove 61 of the cylindrical portion 6. Then, the position of the needle stop B in the rotational direction is determined, and the vertical fixing grooves 32 and 32 can be lowered as they are and can be locked to both ends of the locking pin 7.

次に、針棒１から針止めＢを取り外す方法について述べる。ジョイント部材Ａの摘み部３４を指先でつまみ、上方に押し上げるとジョイント部材Ａが針棒１に沿って上昇する。ここで、固定ピン４はジョイント部材Ａと共に上昇し、針止めＢの周方向における回転を不可能としていた固定ピン４が円筒部６の軸挿入溝６１から外れる。また、ジョイント部材Ａの垂直固定溝３２，３２も上昇するので、係止ピン７が垂直固定溝３２，３２から外れる。これによって針止めＢは周方向における回転が可能となる。 Next, a method for removing the needle stopper B from the needle bar 1 will be described. When the knob 34 of the joint member A is pinched with a fingertip and pushed upward, the joint member A rises along the needle bar 1. Here, the fixing pin 4 rises together with the joint member A, and the fixing pin 4 that has made the rotation of the needle stopper B in the circumferential direction disengaged from the shaft insertion groove 61 of the cylindrical portion 6. Moreover, since the vertical fixing grooves 32 and 32 of the joint member A are also raised, the locking pin 7 is detached from the vertical fixing grooves 32 and 32. As a result, the needle stopper B can be rotated in the circumferential direction.

ただし、針止めＢの係止ピン７は、針棒１の両案内溝１２，１２の水平案内溝１２ｂ，１２ｂによって、垂直方向に規制された状態であるが、水平案内溝１２ｂにおいては、水平方向への移動規制はないので、針止めＢは周方向に回転移動できる。そして、係止ピン７の位置が垂直案内溝１２ａ，１２aの位置に到達すると、係止ピン７と共に針止めＢを下方に移動させると、係止ピン７が垂直案内溝１２ａ，１２ａから外れ、針止めＢを針棒１から取り外すことができる。 However, the locking pin 7 of the needle stopper B is in a state of being regulated in the vertical direction by the horizontal guide grooves 12b and 12b of the both guide grooves 12 and 12 of the needle bar 1. However, in the horizontal guide groove 12b, Since there is no movement restriction in the direction, the needle stopper B can rotate and move in the circumferential direction. When the position of the locking pin 7 reaches the position of the vertical guide grooves 12a and 12a, when the needle stopper B is moved downward together with the locking pin 7, the locking pin 7 is detached from the vertical guide grooves 12a and 12a. The needle stopper B can be removed from the needle bar 1.

１…針棒、１１…中空部、１２…案内溝、１２ａ…垂直案内溝、
１２ｂ…水平案内孔溝、２…バネ、Ａ…ジョイント部材、３…筒状部、３１…摺動孔、
３２…垂直固定溝、４…固定ピン、Ｂ…針止め、５…針保持部、６…円筒部、
６ａ…頂部、６１…軸挿入溝、７…係止ピン。 DESCRIPTION OF SYMBOLS 1 ... Needle bar, 11 ... Hollow part, 12 ... Guide groove, 12a ... Vertical guide groove,
12b ... Horizontal guide hole groove, 2 ... Spring, A ... Joint member, 3 ... Cylindrical part, 31 ... Sliding hole,
32 ... Vertical fixing groove, 4 ... Fixing pin, B ... Needle clamp, 5 ... Needle holding part, 6 ... Cylindrical part,
6a ... top, 61 ... shaft insertion groove, 7 ... locking pin.

Claims

A guide groove comprising a vertical guide groove that opens toward the lower end formed on the lower outer periphery of a hollow needle bar that moves up and down by attaching a needle, and a horizontal guide groove that continues to the vertical guide groove, and toward the lower end Formed in the upper part of the needle holding part and the needle holding part, which has a vertical fixing groove that opens in the vicinity of the needle bar and whose rotation is restricted in the circumferential direction and is movably mounted in the vertical direction. A needle stopper having a cylindrical portion fitted to the lower end of the needle bar and a locking pin protruding outward in a direction orthogonal to the axis of the cylindrical portion, and the vertical fixing groove of the joint member includes It is arranged at a position orthogonal to the horizontal guide groove, and the locking pin of the needle clamp pushes up the joint member and inserts it into the vertical guide groove, and moves in the vertical guide groove by rotating in the circumferential direction. When the fixed groove position is reached, the joint member Lowered, the locking pin is provided with a needle attachment apparatus characterized by comprising fixedly positioned in said vertical fixing groove the horizontal guide groove sewing machine.

A guide groove comprising a vertical guide groove that opens toward the lower end formed on the lower outer periphery of a hollow needle bar that moves up and down with a needle mounted thereon, and a horizontal guide groove that continues to the vertical guide groove, and the needle bar A cylindrical portion having a spring accommodated in the hollow portion, a sliding hole through which the needle bar slides, and a vertical fixing groove formed in the peripheral wall that opens toward the lower end, and the vertical direction of the cylindrical portion A joint member comprising a fixed pin for restricting sliding and rotation of the needle, a needle holding part for holding the needle, a cylindrical part formed on the upper part of the needle holding part and fitted to the lower end of the needle bar, and the cylinder A needle stopper having a locking pin projecting to the outer periphery in a direction orthogonal to the axial center of the portion, the lower end of the needle bar is inserted into the sliding hole of the joint member, and the fixed pin is the lower end of the needle bar It penetrates through a long hole extending in the vertical direction provided in the vicinity, and the joint member is In this range, it is possible to move up and down, and is elastically biased downward by the spring through the fixing pin, and the locking pin of the needle stopper is positioned by the horizontal guide hole groove and the vertical fixing groove. A sewing machine equipped with a needle attachment / detachment device.

A shaft insertion groove is formed along the diametrical direction at the top of the cylindrical portion of the needle clamp, and the fixing pin of the joint member is inserted into the shaft insertion groove in an appropriate mounting state. A sewing machine comprising the needle attaching / detaching device according to claim 2.

The sewing machine provided with the needle attachment / detachment device according to claim 1, wherein the joint member includes a knob.